Improvement in inking apparatus for printing-presses



A.. CAMPBELL INKING APPABATUS FQR PRINTING PRESSES."

N 184,337, v Patenta& Nov.14,187'6.

ANDBEW GAMPBELL, OF BROOKLYN, NEW YORK.

IMPRVEME'NT l N INKING APPARATU FOR PRlNTING-PRESSES Specification forming part of Letters Patent No. 184337, 'dated November 14, 1876; application filed January '26, 1876. 4

To all whom it may concew:

Be it known that I, ANDREW CAMPBELL, of the city ot' Brooklyn, in the county of Kings and State of New York, have invented certain Im provemen ts in Inkin g Apparatus for Printing-Presses, of which the following is aspeci-` fication: i

The improvements which form the subjectmatter of this application were included in an application for Letters Patent forimprove ments in printing-presses filed by me December 26, 1871, from which it has been withdrawn for the purpose of filing the present application.

My invention relates to that class of printing-presses'known as the bed and cylinder press, in which the form reciprocates under what is termed the printingorinpression cylinder, that receives the paper to' be printed and impresses it upon the form as the latter reciprocates thereunder. The form or typebed is supplied with ink before each impression by means of what are termed form-rollers, one or more of which (termed a set) are arranged on one side of the cylinder, so that the form, as it reciprocates, will pass back and forth under the same in contact therewith.-

As the rollers receive a fresh supply of ink for each impression, it is evident that the end of the form which first comes in contact therewith will take therefrom the greatest quantity of ink, and that the rollers will deposit less and less ink as they approach the opposite end of the form, whereby the latter is unevenly inked. It is also evident that the repeated passage of the form in the same direction under any number of rollers will not vary the result, as the same inequality in the inking will result, whether the form be rolled once or half a dozen times.

The object of my invention is to remedy this defect and insure an equal distribution of the ink over the form.

One part of my invention consists in the combination, with the impression cylinder and the form or type-bed, of two sets of formrollers receiving ink independently of each other, and arranged on opposite sides of the impression-cylinder in such a manner that one end of the form will pass under one set ofrollers as the bed reciprocates in one direction and be inked from end to end, as hereinbefore described, while the opposite end of the form, as the bed reverses, is broughtin contact with the opposite set of rollers, which by rolling the form in a reverse direction from that of the former set, equalizes the supply and distribu tion of ink thereon before an impression is made. i

The second part of my invention consists in the arrangement oftheink-fountains between the an gle-rollers and the form-rollers, whereby the angle-rollers pass twice over the inkingtable after the ink has been supplied thereto, instead of only once, as is the case where the fountain is outside ot' the an gle-rollers, whereby a much better distribution is insured.

In the accompanying drawings, Figure 1 is a central longitudinal vertical section of the frame-bed,-feud-table, printing-cylinder, and inkingrollers of a printing-press. Fig. 2 is a plan thereof.

Like letters of reference designate like parts in each of thefigures.

A is the frame; B, the form or bed, and C G' inking-tables at each end of the form; D, the printing-cylinder; E, the feed-table; F F and F' F', two sets of form-rollers; G'rG', two

ink-fountains; H H', doctor-rollers, and I I' two sets of angle-rollers. The bed and cylinder may be actuated by any of the wellknown means employed for the purpose, and the two inking apparatus operated by similar means to that employed in double-cylinder presses.

In Fig. 1 the parts are represented in the act of printing a sheet, the cylinder and form moving in the direction indicated by the arrows, while one end of the form as it advances receives ink from the form-rollers F F preparatory to making the next impression. The form, being traversed by the rollers F in both directions, passes under the rollers F' during the last part of its backward, and first part of its forward, movement, and is thus doubleinked from opposite ends and in opposite directions before making the nextimpression. The cylinder makes two revolutions to each impression and reciprocation of the bed. The fountains and doctor-rollers Gr G' H H' supply ink to the tables O C', from which, respectively, the two sets of form-rollers F E' receive their supply in the ordinary manner in i which a single set is supplied. Each set of form-rolle's may be provided with a distributin g-roller or not, as desired. At the same time that either set of the form-roller's are traversing back and forth over the form, the corresponding set of angle-rollers at the end of the machine are in a like manner passing back and forth over the ink-table in both directions and distributing the ink thereon.

Instead of the inking-tables and angle-rollers above described, the nk from the fountains (which may be of any suitable Construction) may be transferred to the form-rollers by anysuitable set or system of distributingrollers, which will 'supply the two sets of four rollers with ink in as nearly equal quantities as practicable, in which case, as is obvions, the second' part of my invention is not employed.

What I claim as [ny invention is angle and form roller's, substantially as and.

for the purpose hereibefore set'forth.

Witnesses:

J. J. VAN WINKLE, A. C. CAMPBELL.

' ANDREW GAMPBELL. 

